Air and varnish heater.



C. L. MANVILLE.

AIR AND VARNISH HEATER.

APPLICATION FILED SEPT- 4.1915- Patented Sept. 17,1918.

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ATTCIRNEYE:

CLAUDE L; MANvILLE, OF NORTH TONAWANDA, NE YORK, ASSIGN'OR To THERUDOLPEWURLITZER MANUFACTURING COMPANY, OF NORTH TONAWANDA, NEW YORK, ACORPORATION or NEW YORK.

AIR A D vARNIsH HEATER.

Specification of Letters Patent. Patented Sept, 17, 1918.

Application filed. September 4, 1915. Serial No. 49,001.

To all whom it may concern:

Be it known that I, CLAUDE L. MANVILLE, a citizen'Of-the United States,residing at North Tonawanda, in the county of Niagara and State of NewYork, have invented new and useful Improvements in Air and VarnishHeaters, of which the following is a specification.

This invention relates to a method of and an apparatus for heatingvarnish and air in the use of the air-brush system of applying varnishto woodwork.

Heretofore, means have been provided for heating either the air or thevarnish, but the results have proved unsatisfactory. When the varnishalone is heated, the cold air chills and thickens it, preventing itseven flow and producing a comparatively rough or pebbled coating. Whenthe air alone is heated, it fails to break up the varnish granulessufliciently to produce a smooth surface, such as required, for example,for piano cases.

. The object of my invention is the provision of a simple andinexpensive apparatus by which the varnish and air will be heatedpractically to the same degree, in order to cause the varnish to flowmore evenly from the air brush and spread it over the woodwork in afiner and more uniform condition and in comparatively smooth coats, thusrequiring less rubbing of the successive coats or applications ofvarnish.

adapted to be partly. filled with water and which in the example shownin the draw ings is externally screw threaded at its ends to receiveinternally screw threaded unions or couplings 2 which engage caps 4.Between the opposing ends of the reservoir and these caps, suitablepackings 5 are in; terposed. 1 is the valved water-inlet pipe of thereservoir.

' Passing longitudinally and preferably centrally through the reservoir1 is a steam pipe 6 which serves to heat the water theresteam throughit.

Immersed in the Water of the reservoirare two pipes or coils 9 and 10,one for heating varnish and the other for heating air. The inlet ends ofthese coils pass through one of the caps of the reservoir and areconnected respectively with an air compressor or compression tank and avarnish supply tank, not shown, while their opposite ends pass throughthe other cap of the reservoir and are connected with the usual inletsof the air brush, so that the varnish is sprayed and projected againstthe surface to be varnished in a common manner. the varnish heating pipeor coil has valves 12 and 13 for regulating the passage of the fluidthrough them.

14 indicates a water gage connected with the reservoir, and 15 athermometer also connected therewith for observing the temperature ofits contents.

The hot water in the reservoir in turn heats the varnish and air heatingcoils 9 and 10, and by locating the steam pipe 6 centrally in thereservoir, and the coils 9 and 10 on opposite sides thereof, a uniformtherefore smoother and finer-grained, re-

quiring less rubbing to produce the desired ultimate finish andefiecting an important saving in time and labor. Sags or runs which areoften caused by .the air brush are also avoided by the use of thisheater. The

varnish and japan can also be used without thinning with turpentine,thereby saving one or two coats of varnish on case-work of all kinds.

The air pipe has a valve 11 and Furthermore,- the air pressure may be umaterially reduced by the use of this heater,

as the varnish granules are broken up more readily in a heated state andtherefore yield to a lighter air pressure which is less likely toproduce a stippled efiect than a comparatively high pressure.

I claim as my invention:

1. An air and varnish heater for air brushes, comprising a Waterreservoir; means for heating the Water therein, and separate air andvarnish heating coils both arranged in said reservoir, whereby the airand varnish supplied to the air brush are heated to substantially thesame temperature. I V i 2. An air and varnish heater for air brushes,comprising a Water-reservoir, a

team pipe located cent-rally therein, air and varnish heating coilslocated in the reservoir on opposite sides of said steam. pipe andextending through the heads of the reservoir, and controlling valvesarranged in said coils outside of the reservoir. 7

CLAUDE L. MANVILLE.

Copies of this patent may be obtained for five cents each, By addressingthe Gommissionerof Patents. Washington, 13.0.

